Question about Toshiba 50H81 50" Rear Projection Television

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Tv won't come on

Hi we just got a toshiba 50h81 the light is red in front blinks when it wants to ,my husband is pretty smart and needs to know where the Ics are at .also how to tell what the flashing lights are.

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Mine is Toshiba 55 TZ, have it since 98', shutdown and red light blinking problem, search the ned and found out, generally a Convergence IC (stk392-110) problem. bought 2 for $15 at suburban-elect.com (ebay). replaced following direction from http://www.casiasfamily.com/repairlog/tp50h15.html

Open back cover, 9 screws and wirings (pls mark), removed(soldered) a electronic board infront of convergence ic. removed IC (stk392-110) (screwed and soldered).

Replaced everything and voila...! it is now working again..
no more shutsdown and red blinking light. Saves mo $400 for a repariman. of course just be careful with static and stuff.

Posted on Mar 17, 2008

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Red led blinking. tv wont turn on model number


Hi Rick,

First of all, thank you for posting your question here at Fixya.
My first advice is to unplug the unit from the outlet at least 30 minutes to reset itself and check if the symptoms still persists. If yes, may I know if it encountered before then there's some instances that the unit will power up after a few minutes of pressing the power button key?
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The set is in protective shutdown, most likely cause is one of the fuses that protect the convergence circuit are blown.

Depending on your skill levels there are ways to determine if this is the case.

Let me know how much skill you have and I will be happy to assist you.

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A red blinking light could mean that the lamp timer is at it's limit and it is time to change the lamp. You will also have to reset the lamp timer by pushing and holding down 2-3 buttons on the tv or remote. Refer to your user guide for the proper way to reset and or change your lamp.

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Recheck all of your solder connections for bridging and cold solder joints. Check the large output resistors under the heat sink and the smaller ones to the left of them. Check all of the fuses on the power board. And make sure that you check all of your connectors carefully. Also check that you didn't pinch a wire somewhere.
I am not being mean by saying that if you could power up before then more than likely the power up issue was caused by something you did.

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1 Answer

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it happens to my toshiba.. once in a while and gradually shutsdown every minute during the last 2 mos..

Mine is Toshiba 55 TZ, have it since 98', shutdown and red light blinking problem, search the net and found out, generally a Convergence IC (stk392-110) problem. bought 2 for $15 at suburban-elect.com (ebay). replaced following direction from http://www.casiasfamily.com/repairlog/tp50h15.html

Open back cover, 9 screws and wirings (pls mark), removed(soldered) a electronic board infront of convergence ic. removed IC (stk392-110) (screwed and soldered).

Replaced everything and voila...! it is now working again..
no more shutsdown and red blinking light. Saves mo $400 for a repariman. of course just be careful with static and stuff.

I don't know how to solder, so I ask friend to do it for me. But I did the rest. Just to give you an idea that it can be done even if you don't know much about electronics. This in no way a recommendation but just stating my experience. Follow at own risk.

Feb 05, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

Toshiba 50H81


most commom problem is convergance ic gone bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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best advice is go get a manual book on how to fix tv

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http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Apr 02, 2007 | Toshiba 50H81 50" Rear Projection...

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